diff --git a/apps/worker/video_processing/concat_engine.py b/apps/worker/video_processing/concat_engine.py
index d18afe533..af9bd2a5f 100755
--- a/apps/worker/video_processing/concat_engine.py
+++ b/apps/worker/video_processing/concat_engine.py
@@ -226,9 +226,7 @@ class ConcatEngine:
 
         # ── 安全校验：段数上限 ──
         if len(valid_segments) > MAX_CONCAT_SEGMENTS:
-            raise ValueError(
-                f"Too many concat segments: {len(valid_segments)} > {MAX_CONCAT_SEGMENTS}"
-            )
+            raise ValueError(f"Too many concat segments: {len(valid_segments)} > {MAX_CONCAT_SEGMENTS}")
 
         # ── 安全校验：所有视频路径白名单校验 ──
         safe_segments = []